Strapping packaging device

ABSTRACT

A strapping packaging device includes a compressing device, a cutting device, a strap-rolling device and a strap-pressing device. The eccentric cam of the compressing device is actuated to rotate by an operating rod, and the eccentric cam presses down a slide base together with a press block to compress on the strap-clamping member of a packaging strap. The strapping packaging device can not only precisely compress on the strap-clamping member, but also cut off the packaging strap easily at the same time.

BACKGROUND OF THE INVENTION

This invention relates to a strapping packaging device, particularly toone having functions of compressing a strap-clamping member preciselyand cutting off a packaging strap easily at the same time.

A conventional manually operated strapping packaging device, as shown inFIG. 1, includes a strap-compressing device 2, a strap-rolling device 3and a cutting device 4 combined together. In using, firstly a packagingstrap 5 is tightly tied around an article to be packaged, and then bothends of the packaging strap are overlapped and fitted around with astrap-clamping member 6 to be tightly pressed together by means of astrapping sealer 7.

However, the conventional strapping packaging device 1 and the strappingsealer 7 have to be prepared and used independently, therefore a userhas to carry on operating at two different locations with two differenttools, inconvenient in using.

SUMMARY OF THE INVENTION

A main objective of the invention is to offer a strapping packagingdevice able to have its compressing device compressing a strap-clampingmember, and its cutting device cutting off a packaging strap at the sametime.

Another objective of the invention is to offer a strapping packagingdevice having its eccentric cam actuated to force a lateral roller torotate and actuate a slide base simply move up and down along a guiderod and let a press block directly compress the strap-clamping memberwith precision.

BRIEF DESCRIPTION OF DRAWINGS

This invention will be better understood by referring to theaccompanying drawings, wherein:

FIG. 1 is a perspective view of a conventional strapping packagingdevice and a strapping sealer in a used condition:

FIG. 2 is a perspective view of a strapping packaging device in thepresent invention:

FIG. 3 is a side cross-sectional view of the strapping packaging devicein the present invention:

FIG. 4 is a cross-sectional view of a compressing device of thestrapping packaging device in the present invention:

FIG. 5 is a cross-sectional view of a cutting device of the strappingpackaging device in the present invention:

FIG. 6 is a side cross-sectional view of the cutting device assembledwith other components in the present invention:

FIG. 7 is a side cross-sectional view of a packaging strap in aninserted condition in the present invention:

FIG. 8 is a side cross-sectional view of the cutting device cutting offa packaging strap in the present invention:

FIG. 9 is a side cross-sectional view of a compressing device having itspress block compress the strap-clamping member in the present invention:

FIG. 10 is a cross-sectional view of another embodiment of the pressblock in the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A strapping packaging device in the present invention, as shown in FIG.2, includes a body 10, a compressing device 20, a cutting device 30, sstrap-rolling device 40 and a strap-pressing device 50 as maincomponents combined together.

The body 10, as shown in FIGS. 3 and 4, is provided with a fixed base 11at the front end. The fixed base 11 is provided with a hollow receivingspace 12 in the center, a lateral shaft hole 13 at an intermediateportion, and a support block 14 protruding out backward on the outerside and having a lateral insert hole 141. Besides, as shown in FIG. 5,the fixed base 11 is formed at the rear side with a vertical throughhole 15 having a first and a second receiving hole 151 and 152respectively at an upper and a lower portion, with the diameter of thefirst and the second hole 151, 152 larger than that of the vertical hole15. The body 10 is further provided with a bottom base 17, as shown inFIG. 4. Between the fixed base 11 and the bottom base 17 is a receivingspace 18 having an upper and a lower position hole 181 and 182 providedsymmetrically to face each other. Further, a blade base hole 19 isprovided at a proper location of the outer side of the fixed base 11,horizontally extending inward from the outer side of the fixed base 11to communicate with the vertical hole 15.

The compressing device 20, as shown in FIGS. 2, 3 and 4, consists of atransmitting shaft 21, an eccentric cam 22, an operating rod 23, a slidebase 24, a press block 25 and a compression spring 26.

The transmitting shaft 21 has its inner end pivotally fitted in thelateral shaft hole 13 of the fixed base 11 and passing through thereceiving space 12 and its outer end protruding out of the fixed base 11and having a key groove 211.

The eccentric cam 22 is pivotally positioned at the center of thetransmitting shaft 21 and received in the receiving space 12 of thefixed base 11.

The operating rod 23 is pivotally connected on the transmitting shaft 21and positioned outside the fixed base 11. The operating rod 23 is boredat the front end with a fixing hole 231 having a key slot 232, with afixing key 233 inserted in the key slot 232 of the operating rod 23 andthe key hole 211 of the transmitting shaft 21. Further, the operatingrod 23 has its intermediate portion bent into a curved section 234 andits end connected with a handle 235.

The slide base 24, as shown in FIG. 2, is received in the slide space121 under the receiving space 12 of the fixed base 11 to slide up anddown therein. As shown in FIG. 4, the slide base 24 is provided at theupper center with a vertical receiving hollow 241 having a lateral shafthole 242 at a proper location of an intermediate portion for receiving asupport rod 243. Then, a roller 244 is fixed around the support rod 243in the receiving hollow 241 and positioned exactly under the eccentriccam 22 and contacting with the same cam 22. In addition, a verticalslide hole 245 is provided in the slide base 24 at one side of thereceiving groove 241 of the slide base 24. The vertical slide hole 245receiving a guide rod 246 having opposing ends inserted into the upperand lower positioning holes 181 and 182. The guide rod 246 guides andlimits the slide base 24 to move axially up and down only. The slidebase 24 is further bored with a notch 247 at a lower right side, twothreaded holes 248 at proper positions in the inner wall and an inserthole 249 in the bottom.

The press block 25 for compressing a strap-clamping member 70 is boredwith two locking holes 251 at the outer edge respectively for twolocking bolts 252 to be inserted therein and lock the press block 25fixedly at the notch 247 of the slide base 24. The press block 25 isfurther provided at the front bottom with an elastic pin 253 and aspring 254 on the elastic pin 253, which has an inward slanting presssurface 255 at its lower end. Thus, the elastic pin 253 is actuated torise up to let the strap-clamping member 70 get in the blade base hole19, and then protrude downward, letting its press surface 255 hold thefront edge of the strap-clamping member 70 after the strap-clampingmember 70 moves in the blade base hole 19.

The compression spring 26 has one end positioned in the insert hole 249of the slide base 24 and the other end resting against the topside ofthe bottom base 17.

The cutting device 30, as shown in FIGS. 5 and 6, consists of a pull rod31, a push rod 32, a sleeve 33, a spring 34, an upper blade 35, and alower blade 36.

The pull rod 31 is formed with a handle 311 at the rear end and aconnecting head 312 at the front end. The connecting head 312 is fittedastride the support block 14 of the fixed base 11 and provided with apivotal hole 313 pivotally combined with a lateral insert hole 141 bymeans of a pivotal shaft 314. A press block 315 extends forward from theconnecting head 312, and will be pushed downward when the pull rod 31 isturned around with the pivotal shaft 314 acting as a fulcrum.Additionally, the press block 315 is formed with a threaded hole 316 inthe center for receiving an adjusting bolt 317 having its bottom endprotrude out of the bottom of the press block 315.

The push rod 32 is fitted in the vertical hole 15 of the fixed base 11and has its top end positioned exactly under the adjusting bolt 317 ofthe pull rod 31 in order to let the adjusting bolt 317 rest against thepush rod 32. The push rod 32 is formed with an annular recess 321 on thetop outer circumference for fitting a C-shaped clasp 322 therein, and aconnecting fork 323 at the lower end in the second receiving hole 152 ofthe fixed base 11. The connecting fork 323 has a pinhole 324horizontally passing through the connecting fork 323 for receiving aposition pin 325 therein.

The sleeve 33 with a step-cylindrical shape fits around the upper end ofthe push rod 32, fitting in the first receiving hole 151 of the fixedbase 11, and having a round through hole 331 in the center and areceiving space 332 in the interior of the lower end.

The spring 34 fits around the push rod 32, having its upper endextending into the receiving space 332 of the sleeve 33 and its lowerend elastically pushing against the bottom side of the first receivinghole 151 of the fixed base 11.

The upper blade 35 is firmly fixed in the blade base hole 19, having adownward cutting edge 351 at the front end.

The lower blade 36 is coaxially and pivotally combined with the upperblade 35, having an upward cut edge 361 at the front end facing thecutting edge 351 of the upper blade 35. The lower blade 36 has a fixinghole 362 in the center and a connecting head 363 extending inward at theinner side to be inserted in the connecting fork 323 of the push rod 32.The connecting head 363 has a fit groove 364 in the rear end pivotallyengaged with the position pin 325 of the connecting fork 323.

Moreover, the strap-rolling device 40 and the strap-pressing device 50in the present invention respectively have the same structure as that ofa conventional one, with their details omitted here.

In assembling, as shown in FIGS. 4 and 5, firstly, the lateral roller244 is pivotally fitted in the receiving hollow 241 of the slide base24, and the support rod 243 is inserted into the shaft hole 242 to beassembled with the lateral roller 244. Then, the press block 25 is fixedin the notch 247 to be combined together with the slide base 24 by meansof the locking bolt 252, and the compression spring 26 has its upper endsticking in the insert hole 249 of the slide base 24 and its lower endresting against the bottom base 17. At the same time, the guide rod 246is deposited in the vertical slide hole 245 of the slide base 24 and hasits opposite ends respectively lie in the position hole 181 and 182 ofthe fixed base 11 to let the guide rod 246 erected in the receivingspace 18 between the fixed base 11 and the bottom base 17, and then thebottom base 17 is locked in position. In order to let the slide base 24move comparatively smoothly, the opposite sides of an intermediateprojecting portion 2401 at its outer side can be respectively fixed withtwo position members 111 to make the slide base 24 move up and downalong the guide rod 246 in the receiving space 18, as shown in FIGS. 6and 7.

Next, as shown in FIG. 4, the eccentric cam 22 together with thetransmitting shaft 21 is pivotally positioned in the receiving space 12of the fixed base 11, and the operating rod 23 is positioned outside thefixed base 11 and pivotally connected with the transmitting shaft 21 bythe fixing key 233 inserted through the key hole 232 of the operatingrod 23 and engaged with the key hole 211 of the transmitting shaft 21.

Subsequently, as shown in FIG. 5, the pull rod 31 is fitted in thevertical hole 15 of the fixed base 11 and has its connecting fork 323positioned in the second receiving hole 152 of the fixed base 11. Then,the spring 34 is fitted around the push rod 32 at the first receivinghole 151 and covered up by the sleeve 33, and a C-shaped clasp is lockedin the annular recess 321 of the push rod 32, thus the push rod 32restricted to move up and down in the vertical hole 15.

After that, the upper blade 35 and the lower blade 36 are coaxially andpivotally combined together by a fixing pin 37 and placed in the bladebase hole 19 of the fixed base 11, with their cutting edges 351 and 361positioned at the outer side of the blade base hole 19 for facilitatingcutting off a packaging strap. Then, the connecting head 363 of thelower blade 36 is inserted in the connecting fork 323 of the push rod 32and has its connecting groove 364 at the end pivotally fitted with theposition pin 325 of the push rod 32 to permit the lower blade 36 to moveup and down together with the push rod 32 in cutting in cooperation withthe upper blade 35.

Lastly, as shown in FIG. 6, the pull rod 31 has its connecting head 312pivotally secured on the support block 14 of the fixed base 11 by meansof the pivotal shaft 314, and the adjusting bolt 317 of the press block315 is screwed in the threaded hole 316, enabling the adjusting bolt 317to contact with and push against the top end of the push rod 32.

In using, as shown in FIGS. 4 and 8, the strap-clamping member 70 isfirst placed under the compressing device 20 through the front end ofthe compressing device 20, and the elastic pin 253 is actuated toprotrude downward and has its press surface 255 holding the front edgeof the strap-clamping member 70. Synchronously, the opposite sides ofthe strap-clamping member 70 are respectively stuck by the innerposition block 171 and the outer position block 172 of the bottom base17, and the rear side held by the stopping member 112 protrudingdownward under the fixed base 11, as shown in FIGS. 6 and 7.

Then, as shown in FIG. 7, the fixed end 61 of a packaging strap 60 isinserted from back to front through the strap-pressing device 50, thestrap-rolling device 40, the cutting device 30 and an intermediatethrough hole 71 of the strap-clamping member 70 under the compressingdevice 20 to be pressed securely by the strap-pressing device 50. Whilethe free end 62 of the packaging strap 60 is inserted from front to backthrough the intermediate through hole 71 of the strap-clamping member 70to overlap on the fixed end 61 and continue to pass through between theupper blade 35 and the lower blade 36 of the cutting device 30, woundaround the outer edge of the strap-rolling wheel 41 of the strap-rollingdevice 40 and having its end inserted in the seam 42 of thestrap-rolling wheel 41 and secured therein. Then, pull the handle 43 ofthe strap-rolling device 40 to rotate the strap-rolling wheel 41 totighten the free end 62 of the packaging strap 60 and binding a boxtightly.

Next, as shown in FIG. 9, press down the operating rod 23 of thecompressing device 20, letting the eccentric cam 22 press the lateralroller 244 to move downward together with the slide base 24 and thepressing block 25, which presses the strap-clamping member 70 deformedso as to make the overlapped portion of the fixed and the free ends 61and 62 of the packaging strap 60 tightened and engaged with each other.

Lastly, as shown in FIG. 5, pull up the pull rod 31, letting theadjusting bolt 317 of the press block 315 force the push rod 32 movedown together with its connecting fork 323, which will actuate theconnecting head 363 of the lower blade 36 move down, and with the fixingpin 37 acting as a fulcrum, the cutting edge 361 of the lower blade 36will move up to cut off the packaging strap 60 in cooperation with helpof the cutting edge 351 of the upper blade 35.

Furthermore, threaded hole 29 can also be provided at the bottom of thenotch 247 of the slide base 24, and locking holes 256 preset in numberare bored at the bottom edge of the press block 25, with a locking bolt257 inserted from the bottom through the locking hole 257 and thethreaded hole 29 to lock the press block 25 and the slide base 24together.

As can be noted from the above description, this invention has thefollowing advantages.

1. The strapping packaging device can not only press the strap-clampingmember 70 by the compressing device 20, but also cut off the packagingstrap by the cutting device 30 at the same time, easy and convenient inuse.

2. The eccentric cam 22 is actuated to press the lateral roller 244 toforce the slide base 24 simply move up and down along the guide rod 246,so that the press block 25 can directly compress the strap-clampingmember 70 precisely and smoothly.

While the preferred embodiment of the invention has been describedabove, it will be recognized and understood that various modificationsmay be made therein and the appended claims are intended to cover allsuch modifications that may fall within the spirit and scope of theinvention.

1. A strapping packaging device comprising: a body, a compressingdevice, a cutting device, a strap-rolling device and a strap-pressingdevice; said body provided with a bottom base and a fixed base at thefront side, said fixed base having a receiving space in an intermediateportion, the receiving space having an upper positioning hole and lowerpositioning hole; and said cutting device comprising: a pull rodprovided with a connecting head at the front end to press down a pressblock of said compressing device; a push rod fitted in a vertical holeof said fixed base, and provided with a pin hole for receiving aposition pin; and an upper blade and a lower blade coaxially andpivotally combined together, said upper blade and said lower bladepositioned in a blade base hole at a predetermined location of an outerside of said fixed base, said upper blade being fixed and having adownward cutting edge, said lower blade formed inward with a connectinghead extending into the interior of said blade base hole, saidconnecting head of said lower blade fitted with said position pin ofsaid push rod, said lower blade having an upward cutting edge; saidpress block of said pull rod actuated to push down said push rod, saidpush rod, with said position pin acting as a fulcrum, actuating saidlower blade move up and cut off a packaging strap in cooperation withsaid upper blade when said pull rod is pulled up.
 2. The strappingpackaging device as claimed in claim 2, wherein said connecting head ispivotally connected with a support block outside said fixed base, saidconnecting head formed with the press block extending forward, saidblock provided with a threaded hole in the center for an adjusting boltscrewed therein, said adjusting bolt having its bottom end protrudingout of the bottom of said block.
 3. The strapping packaging device asclaimed in claim 2, wherein said push rod is formed with an annularrecess at the top outer circumference, said annular recess fitted inwith a C-shaped clasp, said push rod provided with a connecting fork atthe lower end for fitting said position pin, a sleeve with astep-cylindrical shape fitted around an upper end of said push rod, saidsleeve formed with a round through hole in the center and a receivingspace in the interior of the lower side for receiving a spring.